Stamp



FIG. 1 is a perspective view of a design for a stamp showing my new design;

FIG. 2 is a front elevation thereof, the side opposite being a mirror image;

FIG. 3 is a side elevation thereof, the side opposite being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design of the stamp, as shown and described. 